1297278 has 24 divisors (see below), whose sum is σ = 2843568. Its totient is φ = 427392.

The previous prime is 1297273. The next prime is 1297279. The reversal of 1297278 is 8727921.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1375 + ... + 2117.

It is an arithmetic number, because the mean of its divisors is an integer number (118482).

2^1297278 is an apocalyptic number.

1297278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1297278 is an abundant number, since it is smaller than the sum of its proper divisors (1546290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1297278 is a wasteful number, since it uses less digits than its factorization.

1297278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 845 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 1297278 is about 1138.9811236364. The cubic root of 1297278 is about 109.0630614525.

Adding to 1297278 its product of digits (14112), we get a triangular number (1311390 = T₁₆₁₉).

The spelling of 1297278 in words is "one million, two hundred ninety-seven thousand, two hundred seventy-eight".